/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/FaceGroupUtil.h
Find the set of group ids used in Mesh
namespace FaceGroupUtil { void FaceGroupUtil::FindAllGroups ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & Mesh, [TSet](API\Runtime\Core\Containers\TSet)< int32 > & GroupsOut ) }